<%@ page language="java" contentType="text/html; charset=utf-8"
    pageEncoding="utf-8"%>
<!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.01 Transitional//EN" "http://www.w3.org/TR/html4/loose.dtd">
<html>
<head>
<meta http-equiv="Content-Type" content="text/html; utf-8">
<title>Insert title here</title>
</head>
<body>
<form action="servlet/update" method="post"> 
摘要：<input name="signcertdigest" id="signcertdigest"><br>
有效期：<input name="validity" id="validity" value="1"><br>
<input type="submit" value="提交" >
</form>
</body>
</html>